Microphone Muting Control for Echo Reduction in Multi-Device Audio
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing teleconferencing systems face challenges in controlling microphones within a common location, leading to echo and feedback issues, as well as difficulties in ensuring effective voice reception from all parts of the room.
Innovation Solution
A system comprising a control unit that communicates with multiple communication devices at a common location, allowing it to receive signals and dynamically mute or unmute microphones and speakers based on audio signals, ensuring only one device is actively transmitting at a time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple microphones are left unmuted in a common location, then voice reception from all parts of the room is improved, but echo and positive feedback loops occur
Solution Approach 1:
The system enables automatic microphone management where the communication device itself monitors audio levels and controls its own microphone mute state based on detected speech activity, eliminating the need for manual intervention while preventing echo and feedback issues
Solution Approach 2:
The system implements audio level monitoring and automatic microphone control by detecting speech activity levels and adjusting microphone mute states accordingly, creating a closed-loop feedback mechanism that prevents echo and feedback while ensuring clear voice reception
2Object-generated harmful factors
If multiple microphones are muted to prevent echo, then echo and feedback are reduced, but voice reception from all parts of the room deteriorates
Solution Approach 1:
The system dynamically adjusts microphone mute states based on real-time speech activity detection, transitioning between muted and unmuted states as needed to maintain both echo prevention and clear voice reception from all room locations
Solution Approach 2:
Each communication device autonomously monitors its own audio levels and controls its microphone state based on detected speech activity, enabling adaptive voice reception without manual intervention while maintaining audio quality
3Reliability
If microphone signals are mixed together, then all voices are captured, but timing and synchronization complexities arise
Solution Approach 1:
The system segments the audio capture function by enabling only one microphone at a time based on speech activity detection, avoiding the complexity of mixing multiple simultaneous microphone signals while still capturing all necessary voices through sequential activation
Solution Approach 2:
The system changes the operational state parameter of microphones from a static all-on configuration to a dynamic single-active configuration based on speech detection, simplifying timing and synchronization while maintaining complete voice capture
Data Source
AI summary
A system and method include a control unit in communication with a plurality of communication devices at a common location. Each of the plurality of communication devices includes a microphone. The control unit is configured to receive one or more audio signals from the microphone of each of the plurality of communication devices. The control unit is further configured to selectively unmute the microphone of one of the plurality of communication devices and mute the microphone of at least one other of the plurality of communication devices based on the one or more audio signals.